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  • Title: Studies on the physiopathology of chronic obstructive pulmonary disease in the horse. VII. Percentage venous admixture.
    Author: Littlejohn A, Bowles F, Maluleka W.
    Journal: Onderstepoort J Vet Res; 1982 Dec; 49(4):211-4. PubMed ID: 6820976.
    Abstract:
    The percentage venous admixture was calculated in 21 clinically normal horses and ponies and in 13 horses and ponies with chronic obstructure pulmonary disease (COPD). The oxygen contents of pulmonary end-capillary blood, arterial and mixed venous blood were calculated from blood and respiratory gas values and substituted in the shunt equation. The mean percentage venous admixture of the COPD subjects was significantly greater than that of the normal subjects. It was concluded that a larger proportion of alveoli in the lungs of COPD subjects were hypoventilated than that of alveoli of the normal lungs.
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